The UV curing paint system
时间:2016-04-13 15:13来源:sankun点击: 次
UV curing pigment system aspects of the subject has been a uv-curable research field in a challenging project. Experts of different pigments (pigments and pigment volume), to check the paint surface modification effect the performance of the system, not only including the rheological properties of liquid resin, curing speed, gloss, UV curing material surface energy and friction performance, thermal performance and mechanical performance, etc. And on this basis, with the help of the X-ray diffraction analyzer (XRD), scanning electron microscopy (sem), energy spectrum (EDS), thermal analyzer (TG and DSC), metallographic microscope, characterization methods, further elaborated pigment modification of mechanism of changes of pigment properties of UV curing materials. Research shows that: paint surface modified appropriately, liquid resin curing speed (such as blue pigment by the modified with triethanolamine, 45 s down to 14 s), gloss also improved after curing materials.
The pigment to ultraviolet light absorption and scattering were considered outside, will cause the loss of efficiency of uv-curable paint on the surface and interface area of the resin remaining it is caused by air composition may contain pigments light cure resin cure another important reason for the declining speed of. Electron microscope and electron energy spectrum research results show that the modified triethanolamine blue paint is not only the air composition of the pigment/resin interface is greatly reduced, and the pigment of junction with the resin modified before and after the composition of carbon, nitrogen, oxygen, and the binding energy changed obviously are pretty, and has the obvious interface coupling phenomenon. Surface modification can not only reduce the paint surface adsorption air curing efficiency caused by the falling trend, at the same time can be effectively before UV absorbed by pigment initiator UV absorption of competition, raising polymerization, in order to improve the efficiency of curing.
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